Benzinga's Top #PreMarket Losers

Vertex Pharmaceuticals (NASDAQ: VRTX ) shares fell 6.75% to $64 in the pre-market trading after the company reported Phase 3 study results of Ivacaftor. Facebook (NASDAQ: FB ) dipped 2.25% to $54.32 after the company commenced a public offering of 70 million shares of its Class A common stock.